List of top Chemistry Questions asked in JEE Advanced

Passing $H_2 S$ gas into a mixture of $Mn^{2+}, Ni^{2+}, Cu^{2+}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates

Extra pure $N_2$ can be obtained by heating

The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

The species having pyramidal shape is

The species which by definition has zero standard molar enthalpy of formation at $298 \,K$ is

Among the following, intensive property is (properties are)

The packing efficiency of the two-dimensional square unit cell shown below is

Plots showing the variation of the rate constant $(k)$ with temperature $(T)$ are given below. The plot that follows Arrhenius equation is

Aqueous solutions of $HNO_3 \, KOH, \, CH_3COOH$ and $CH_3COONa $ of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is(are)

The correct statement about the following disaccharide is

In the reaction. the intermediate(s) is/are

In the Newman projection for $2,2$-dimethylbutane $X$ and $Y$ can respectively be

The synthesis of $3$-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are

The reagent(s) used for softening the temporary hardness of water is(are)

The ionisation isomer of $[Cr(H_2O )_4Cl(NO_2 )]Cl$ is

Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule $B_2$ is

The complex showing a spin only magnetic moment of $2.82\, BM$ is

For a first order reaction, $A\rightarrow P$, the temperature $(T)$ dependent rate constant $(k)$ was found to follow the equation: $log\, k= (-2000)\frac {1}{T}+6.0$. The pre-exponential factor $A$ and the activation energy $E_a$, respectively, are

Given that the abundant of isotope $^{54}Fe$, $^{56}Fe$ and $^{57}Fe$ are $5\%$, $90\%$ and $5\%$ respectively, the atomic mass of $Fe$ is :

The spin only magnetic moment value (in $ $B.M.$ $ unit) of $ Cr(CO)_{6} $ is

The nitrogen oxide(s) that contain(s) $N-N$ bond(s) is/are i)$N_2O$ ii) $N_2O_3$ iii) $N_2O_4$ iv) $N_2O_5$

In the following carbocation; $H/CH_3$ that is most likely to migrate to the positively charged carbon is

The correct stability order of the following resonance structure is (I) $H_2C = _{N}^{+} = _{N}^{-} \, \, \, \, $ (II) $ H_2 \, _{C}^{+} - N = _{N}^{-}$ (c) $H_2 \, _{C}^{-} - _{N}^{+} = N \, \, \, \, $ (IV) $H_2 {C}^{-} - N = N $

The reaction of $P_4$ with $X$ leads selectively to $P_4O_6$. The $X$, is

The correct statement(s) about the compound $H_3C(HO)HC-CH=CH-CH(OH)CH_3(X) $ is/are